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Egg Probe Tracks Tainted Feed

Salmonella Not Found Until After Shipments Reached Farm, Early Tests Indicate

By

Alicia Mundy And

Bill Tomson

Updated Sept. 17, 2010 12:01 a.m. ET

Early tests suggested chicken feed may have become contaminated after it arrived at the Iowa farm at the center of a huge egg recall, helping investigators zero in on the cause of this summer's salmonella outbreak.

The Food and Drug Administration said earlier that it found salmonella in feed at Wright County Egg Co. but didn't know how the bacteria got there.